Improvement in molds for sewer-pipes



T. MADELEY.. IImprovement in Molds for Sewer-Pipe.

Patented April 25,1811.

Emme@ teniet Senio @anni effin.

THOMAS MADELY, 0,1? ROCHESTER, NEW`YORK;

Letters Patent No. 114,164, datedApril 25, 1,871.

IMPROVEMENT IN MOLDS FOR SEWER'PIPES.

The Schedule referred to in these Letters Patent and making part of the lame.

.lo all ywhom it may concern.-

Be it known that 1,' THOMAS MADELEY, of the city of Rochester, county of Monroe and State of New York, have invented a certain new and useful Improvement in Molds for Making Composition Pipe for sewers and other uses, ot' which the following is la specification.

Nature of the Invention.

This invention consists ot'a sectional mold, held at the top by folding leaves and at the bottom by remov` able pins, aud having a core which is drawn downward by a screw, the whole as hereinafter described.

General Description..

In the drawing- Figure 1 is a vertical section.

Figure 2, a horizontal section.

A represents a frame having a table, B.

On this table rests the mold, which consists of two or more sections, C C', which, when fitted together, nre in the shape ofthe pipe to be formed.

The lower end is simply a straight cylinder, while the upper end is made flaring or enlarged, as shown at c, to form the coupling-socket of the next section of pipe.

The lower ends of the sections of the mold are held in place on table B by loose pins, D D', which set in holes around the circle, and are removable at pleasure. The upper end is held by two leaves or lids, E E',

'hinged at the outside, which turn down and encircle the mold.

This arrangement of the folding leaves and the removable pins, combined with the sectional mold, forms the Vfirst feature of my invention.

When ythe pipe has been formed and the core witndrawn the leaves are opened and the pins removed, and the sections of the mold come apart', thus exposing-the pipe entire.

In this manner great expedition and facility of ac-l tion are insured,'and thereisA no injury to the pipe in removal.

Inside the Vmeld is situated the core Gpwhieh i's simply-a cylinder extending the length ofthe straight portion of the pipe.

After the mold is filled withthe composition to the height of this core a block, G', of greater diameter, is placed on top the core, which forms the core to the enlargement or coupling-head a. The composition is then h'lled around this block, and the pipe is then complete. 'To remove the core, the upper part is then taken o' and the main core drawn down. i

To accomplish this latter act-ion a screw, H, is seg cured, to turnstationary below, and its end enters the lower end of the core and engages therewith. As the screw is turned -the` core is drawndownward until it f is entirely free of the mold, when the latter may be removed, and the pipe is free, as above described.

' This arrangement of the core and screw forms the second feat-ure of my invention. coreV is readily removed, and without any iuj ury at all to the pipe which is being formed. It can be turned down as gradually as'desired, and with the utmost precisiona necessary condition in the'formation of By this means the 

